Microstructure evolution process of Ferro-Aluminum based sandwich composite for electromagnetic shielding

作者：Luo Zhichao; Zhang Qiang^*; Ma Xiangyu; Wu Gaohui

来源：Micron, 2014, 64: 34-38.

DOI：10.1016/j.micron.2014.04.003

• Sandwich composite
• Diffusion
• Pure iron
• Electromagnetic shielding

In this paper, sandwich composite (SWC) with Fe-Al soft magnetic alloy sandwiched between pure iron substrates was proposed and fabricated by hot pressing and diffusion treatment. The microstructure evolution process of the composite was investigated. Fe/Fe2Al5/Fe diffusion couple was obtained at 700 degrees C and subsequently kept at 900 degrees C for further isothermal diffusion. During the diffusion reactive process, we confirmed that major FeAl2 and minor Fe4Al13 were produced when Fe2Al5 dissolved. After 10 h of diffusion treatment, FeAl and alpha-Fe(Al) were the only two intermetallic phases left. Except FeAl2, the thickness of each intermetallic layer held good parabolic relationship with the diffusion annealing time.

• 出版日期2014-9
• 单位哈尔滨工业大学